Water temperature in St. John's

This data the coastal St. John's sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in St. John's

Water temperature in St. John's today is 9.3°C. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near St. John's was recorded in 2022 and was 12.2°C, and the coldest was recorded in 2009 at 7.3°C. Sea water temperature in St. John's is expected to drop to 8.5°C in the next 10 days. October average water temperature in St. John's is 9.7°C, the minimum temperature is 4.3°C, and the maximum is 16.2°C.

Throughout the year, the water temperature in St. John's does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in St. John's in winter reaches 1.2°C, in spring 0.9°C, in summer the average temperature rises to 10.9°C, and in autumn it is 9.6°C.

St. John's water temperature now

The sea salinity in St. John's is 31.14‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in St. John's for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for St. John's. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast St. John's. Data in table shown for 16 October 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in St. John's

St. John's weather forecast

Current temperature and weather

Data in a table show St. John's temperature today (16 October 2025). For more information and forecast for a few days, go to the weather forecast St. John's.

0-3 h	3-6 h	6-9 h	9-12 h
7.4°C	7.4°C	7.5°C	8.3°C

12-15 h	15-18 h	18-21 h	21-24 h
8.6°C	8.6°C	8.6°C	8.7°C

St. John's water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in St. John's. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in St. John's on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in St. John's

The nearest beaches and cities from St. John's with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Conception Bay South	10.7°C	9°C		0.36 m
Clarenville	10.1°C	7°C		0.27 m
Newtown	7°C	7°C		0.81 m
Harbour Breton	11.6°C	8°C		0.16 m
Grand Bank	11.2°C	9°C		0.26 m
Gander Bay	9°C	6°C		0.26 m
Lewisporte	9.5°C	7°C		0.31 m
Botwood	9.2°C	7°C		0.31 m
Fogo	7.4°C	6°C		0.26 m
Saint-Pierre	11.9°C	9°C		0.55 m

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St John's, St Johns

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Our report for St. John's is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.